iGCSE Biology (0610)-15.1 Drugs – iGCSE Style Questions Paper 3

Question

Fig. 6.1 shows a section of a bronchiole from the lungs of a person who never smoked cigarettes
(non-smoker) and a section of a bronchiole from a person who smoked cigarettes for several
years (smoker).
The two sections were taken from the same relative position in the lungs and are drawn to the
same scale.

(a) (i) Table 6.1 gives a comparison between the bronchiole of a non-smoker and a smoker.
Use Fig. 6.1 to complete Table 6.1.
An example has been done for you.

(ii) Identify two other ways in which the bronchiole in a non-smoker is different from the

bronchiole in a smoker.
1 ……………………………………………………………………………………………………………………….
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2 ……………………………………………………………………………………………………………………….
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(b) A person who smokes has a higher risk of lung infections than a person who does not smoke.
Use evidence from Fig. 6.1 to explain why the smoker has a higher risk of lung infections than
a non-smoker.
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(c) State the name of two substances in tobacco smoke that are harmful.
1 ………………………………………………………………………………………………………………………………
2 ………………………………………………………………………………………………………………………………

Answer/Explanation

Ans:

Question

Fig. 8.1 shows the apparatus used for investigating the contents of cigarette smoke.

(a) (i) The chemical from the smoke that stained the cotton wool was tar.
State two effects tar has on the body.

1 ………………………………………………………………………………………………………………………
………………………………………………………………………………………………………………………….
2 ………………………………………………………………………………………………………………………
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[2]

(ii) State one conclusion that can be made from the limewater results.

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(iii) State what the Universal Indicator results show about cigarette smoke.

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…………………………………………………………………………………………………………………….. [1]
(iv) Name one component of cigarette smoke, other than tar and carbon monoxide, not

found in this investigation.
…………………………………………………………………………………………………………………….. [1]
(b) The cigarette had a filter to collect harmful substances, but it did not work very well.
Suggest how the results in Table 8.1 show that the filter did not work very well.
……………………………………………………………………………………………………………………………. [1]
(c) Explain why cigarette smoke makes the transport of oxygen by the blood less effective.
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Answer/Explanation

Ans:

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